Rapidweaver Themes by North Street Productions:

http://www.northstreetproductions.net/rapidweaver-themes/rapidweaver-themes.html

Disclaimer: The description in the Hover-boxes are not from me. I copied and pasted this from the developers site. This is also for all screenshots.
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    NSP Three

     

    NSP Three is a RapidWeaver theme that is simple but elegant and very customizable. It is based on the idea of having opposite corners with very round corners with the remaining corners slightly rounded.
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    NSP Two

     

    The NSP Two RapidWeaver theme combines several of my favorite design elements into one cohesive and unique theme. The variety of patterns, textures, fades, colors, fonts and page widths allow for a wide range of design possibilities. I’ve tried to have something for everyone available in this theme without sacrificing aesthetic appeal.
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    NSP One

     

    Beautiful Backgrounds of gradient color or unique, custom repeating tiles are just one of the great design features in NSP One. Choose from 5 different gradient color combinations and 12 different tiled patterns for the background of each page.
    Transparent Page, Menu and Sidebar Backgrounds subdue the colorful backgrounds enough to make text more readable but not enough to keep those nice gradients and patterns from coming through. They also add a subtle highlight to active menu links and the sidebar. Choose from two tones of black or white.
    Fonts, Page Widths and Colors give you even more options for customization. Select the color of your choice for the text of each part of the page. You can even change the color of the menu border.